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Message-ID: Date: Tue, 4 Jun 2019 21:15:04 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 05 Jun 2019 01:15:08 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] sigsegv in chardev on iotest 045 (raw) X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Running tests on a development branch (I haven't touched chardev stuff, I swear!); I ran into the below crash where s->ioc was NULL. I don't have the time to investigate at this exact moment, so please excuse the hasty report so I don't forget to tell someone. It does not reproduce consistently, and I can't get it to show up again. (Is this maybe just a race on close where the device went away too fast and it had nowhere to print the information? --js) --- /home/bos/jhuston/src/qemu/tests/qemu-iotests/045.out 2019-04-05 17:50:47.309213199 -0400 +++ /home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/045.out.bad 2019-06-04 20:55:34.410469853 -0400 @@ -1,3 +1,5 @@ +WARNING:qemu:qemu received signal 11: /home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/../../x86_64-softmmu/qemu-system-x86_64 -chardev socket,id=mon,path=/home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/scratch/tmp4pnjwtvk/qemu-21961-monitor.sock -mon chardev=mon,mode=control -display none -vga none -qtest unix:path=/home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/scratch/qemu-21961-qtest.sock -machine accel=qtest -nodefaults -machine accel=qtest -add-fd fd=3,set=1,opaque=image0:r -add-fd fd=4,set=1,opaque=image1:w+ -add-fd fd=5,set=0,opaque=image2:r -add-fd fd=6,set=2,opaque=image3:r -add-fd fd=7,set=2,opaque=image4:r -drive if=virtio,id=drive0,file=/dev/fdset/1,format=raw,cache=writeback +WARNING:qemu:qemu received signal 11: /home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/../../x86_64-softmmu/qemu-system-x86_64 -chardev socket,id=mon,path=/home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/scratch/tmp4pnjwtvk/qemu-21961-monitor.sock -mon chardev=mon,mode=control -display none -vga none -qtest unix:path=/home/bos/jhuston/src/qemu/bin/git/tests/qemu-iotests/scratch/qemu-21961-qtest.sock -machine accel=qtest -nodefaults -machine accel=qtest -add-fd fd=3,set=1,opaque=image0:r -add-fd fd=4,set=1,opaque=image1:w+ -add-fd fd=5,set=0,opaque=image2:r -add-fd fd=6,set=2,opaque=image3:r -add-fd fd=7,set=2,opaque=image4:r -drive if=virtio,id=drive0,file=/dev/fdset/1,format=raw,cache=writeback ........... ---------------------------------------------------------------------- #0 0x0000560165e2d431 in object_get_class (obj=0x0) at /home/bos/jhuston/src/qemu/qom/object.c:905 #1 0x0000560165f1328c in qio_channel_writev_full (ioc=0x0, iov=0x7ffe7d79e380, niov=1, fds=0x0, nfds=0, errp=0x0) at /home/bos/jhuston/src/qemu/io/channel.c:76 #2 0x0000560165efa7c0 in io_channel_send_full (ioc=0x0, buf=0x7fd0dc004e20, len=138, fds=0x0, nfds=0) at /home/bos/jhuston/src/qemu/chardev/char-io.c:123 #3 0x0000560165efe262 in tcp_chr_write (chr=0x5601680fbeb0, buf=0x7fd0dc004e20 "{\"timestamp\": {\"seconds\": 1559696132, \"microseconds\": 913471}, \"event\": \"SHUTDOWN\", \"data\": {\"guest\": false, \"reason\": \"host-qmp-quit\"}}\r\n", len=138) at /home/bos/jhuston/src/qemu/chardev/char-socket.c:160 #4 0x0000560165ef62b4 in qemu_chr_write_buffer (s=0x5601680fbeb0, buf=0x7fd0dc004e20 "{\"timestamp\": {\"seconds\": 1559696132, \"microseconds\": 913471}, \"event\": \"SHUTDOWN\", \"data\": {\"guest\": false, \"reason\": \"host-qmp-quit\"}}\r\n", len=138, offset=0x7ffe7d79e460, write_all=false) at /home/bos/jhuston/src/qemu/chardev/char.c:113 #5 0x0000560165ef6421 in qemu_chr_write (s=0x5601680fbeb0, buf=0x7fd0dc004e20 "{\"timestamp\": {\"seconds\": 1559696132, \"microseconds\": 913471}, \"event\": \"SHUTDOWN\", \"data\": {\"guest\": false, \"reason\": \"host-qmp-quit\"}}\r\n", len=138, write_all=false) at /home/bos/jhuston/src/qemu/chardev/char.c:148 #6 0x0000560165ef9408 in qemu_chr_fe_write (be=0x5601680fb680, buf=0x7fd0dc004e20 "{\"timestamp\": {\"seconds\": 1559696132, \"microseconds\": 913471}, \"event\": \"SHUTDOWN\", \"data\": {\"guest\": false, \"reason\": \"host-qmp-quit\"}}\r\n", len=138) at /home/bos/jhuston/src/qemu/chardev/char-fe.c:42 #7 0x00005601659b8c4a in monitor_flush_locked (mon=0x5601680fb680) at /home/bos/jhuston/src/qemu/monitor.c:404 #8 0x00005601659b8e54 in monitor_puts (mon=0x5601680fb680, str=0x560168a57110 "{\"timestamp\": {\"seconds\": 1559696132, \"microseconds\": 913471}, \"event\": \"SHUTDOWN\", \"data\": {\"guest\": false, \"reason\": \"host-qmp-quit\"}}\n") at /home/bos/jhuston/src/qemu/monitor.c:446 #9 0x00005601659b909a in qmp_send_response (mon=0x5601680fb680, rsp=0x560168f72310) at /home/bos/jhuston/src/qemu/monitor.c:493 #10 0x00005601659b912e in monitor_qapi_event_emit (event=QAPI_EVENT_SHUTDOWN, qdict=0x560168f72310) at /home/bos/jhuston/src/qemu/monitor.c:521 #11 0x00005601659b9229 in monitor_qapi_event_queue_no_reenter (event=QAPI_EVENT_SHUTDOWN, qdict=0x560168f72310) at /home/bos/jhuston/src/qemu/monitor.c:546 #12 0x00005601659b95bc in qapi_event_emit (event=QAPI_EVENT_SHUTDOWN, qdict=0x560168f72310) at /home/bos/jhuston/src/qemu/monitor.c:621 #13 0x0000560165f70707 in qapi_event_send_shutdown (guest=false, reason=SHUTDOWN_CAUSE_HOST_QMP_QUIT) at qapi/qapi-events-run-state.c:44 #14 0x0000560165b60e88 in qemu_system_shutdown (cause=SHUTDOWN_CAUSE_HOST_QMP_QUIT) at /home/bos/jhuston/src/qemu/vl.c:1777 #15 0x0000560165b60fa1 in main_loop_should_exit () at /home/bos/jhuston/src/qemu/vl.c:1825 #16 0x0000560165b610a6 in main_loop () at /home/bos/jhuston/src/qemu/vl.c:1864 #17 0x0000560165b68686 in main (argc=28, argv=0x7ffe7d79ea98, envp=0x7ffe7d79eb80) at /home/bos/jhuston/src/qemu/vl.c:4526